* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

.nav {
    height: 50px;
    background-color: rgba(113, 113, 113, 0.7);
    color: white;
    line-height: 50px;
    padding-left: 200px;
}